Lap



Dec. s, 1931. E. ANSTETT 1,835,257

Y Y LAP Filed April 15, 1929 e ye/z for fa] Ufff-jeff position with parts in section;

vprovided withV an inwardly bent endC, i

Patented Dec. 8, 1931 ocurrio STA EDGAR ANSTETT, or cHIcgAGdanLmors, AssrGNon To RICHARD GROETGHEN, on oHI- Y ,PATIENT lOFI-Ica A y Application mea april 15,

for use upon' a relatively permanent vholding toolin which the tool is of a harder material than the lap. .Another object is to vforni the lap itself so that its operation userves to dis- Y tribute and convey abrasive or other lubricant along the Vsurface beingV acted upon. Other' objects will appear from time .to time in the course of the specification and claims.

The invention is illustrated moreV Iorless diagrammatically 17in the drawings wherein- Figure 1 i a slde elevation 4of thelap in Figure 42 is a side elevation ofthe tool; i' Figure Sis a side' elevation of the lapremoved from the tool; V-

Figure 4 is a transverse cross section taken on line 4-4of Figure 1" shown on an enlarged scale; Y, Y `V Figure 5 .is altransverse `section taken on line 5-5 of Figure 3 shown on-anenlarged scale; l Q v T Like parts are indicated by like characters throughout vthe `specilicationy and drawings. A is ai tool holder in which a tool A1 may be removably positioned. The tool is pro-v videdfwith a slot A?, a relatively large collar ,A3 and a smaller collar A1 between which a grooveor depression A5 is formed; Y-

The collar A4 vmay'ac't as a stop'to stopY or limit upward movement of thelap whichfis A to be puton thetool. i v i B is apiece of material provided withj'a C is the lap. .As shown it is'form'ed of a strip'of material, preferably metal, bentinto the form of aheliX; :At its upper end 'it is reduced asat C1 and this'reducedportion is inwardlybent at C2@ VAt itslower end .the lap portion is reduced asiat C3 and 'it maybe accompanying" Y vappropriate, lapping members C are formed.

Ithe appropriatefsize is chosen and the corre- Y sponding lap is fitted upon it. The toolwith the lap upon it is then inserted in a perfora-V tion-and lubricant is supplied.' Ordinarily -being lapped. 'The helical groove formed by ft'ial feature ofthe invention, but under Some circumstances it is important. M Y perforation B1, infwhiehthe lap is shown as `positioned `for1work.

1929. seran Nq.355`,o64.

When the tool. is used it is normally used with some sort of abrasiveor other lubricant. This-material, D, isindicated diagrammatically as lying iwithin theslot A2 and it is shown also at D1 as lying within the helical groove formed by the lapmember itself.V f It will be obvious that while I have shown and described f an operative device, many changes may be made in the size, shape,re lation, proportion and distribution of parts without departing materially from the spirit of my invention, and I wish thereforemy description Vand drawings to be considered as in a large measure diagrammatic.

The use and operation of this invention are I as follows: ,A K

The carrying tools A1 may be made in any suitable varietyof sizes and for these sizes Then aperforation is to be lapped, a tool of itv will be supplied to'rthe slot and it willrun f4 down the slot and from this will flow out into the spaces formed `by the helical lapping member and will thus conform to theoutside or working lfacev of that member. The tool is then set in motion and carries with it the lap which has a lapping action. V'The lubricant *or abrasive iiowsfout.` as above described `to the outer or working face of thelap and con-- `tacts lthe wall of the perforation `which is the lapl itself under some circumstances has a conveyingeifect, acting like` alscrew conveyor and tending to move the abrasive along the working surface.: Thisv is not an essen ,provided with a portion adaptedto engage the opening in said` main member and being generallyself supporting.

2. In a lapping device, a main supporting part provided With an opening in the form of a slot formed in it, and an auxiliary lapping part adapted for removable mounting upon said main part, said auxiliary part shaped in a generally helical form and provided with a portion adapted to engage the opening in said main member and formed of such material as to be generally'self-supporting.

3. In a lapping device, a main supporting part provided with a generally axial opening in the form of a slot formed in it, and an auxiliary lapping part adapted for reinovable mounting upon said main part, said auxiliary part shaped in a generally helical form and provided with a portion adapted to engage the opening in `said main member and formed of such material as to be generally seltsupporting.

4. In a lapping device, a main supporting part provided With an opening, and an auxiliary lapping part adapted for removable mounting upon said main part, said auxiliary part being of a material softer than the main part shaped in a generally helical form and provided with a portion adapted to engage the opening in said main member and formed of such material as t0 be generally self supporting.

5. In a lapping device, a main supporting part provided With an opening and having a lap limit and an auxiliary lapping part adapted for removable mounting upon said main part, said auxiliary part shaped in a generally helical form to provide a helical groove throughout its length and provided with a portion adapted to engage the opening in said main memberV and formed of such material as to be generally self supporting.

6. In a lapping device, a main supporting partprovided With an opening and having a lap limit and an auxiliary lapping part adapted for removable mounting upon said main part, said auxiliary part shaped of a single piece in a generally helical form to provide a helical groove throughout its length and provided with a portion adapted to engage the opening in said main member and formed of such material as to be generally self supporting.

7. In a lapping device, a main supporting part provided with an opening, and having a lap limit andan auxiliary lapping part adapted for removable mounting upon said main part, said auxiliary part shaped ofV a single piece in a generally helical form and provided with an inbent portion adapted Vto engage the opening 1n said main member part adapted for removable mounting upon said main part, said auxiliary part shaped of a single piece in a generally helical form and provided with a portion adapted to engage the opening in said main member and formed of such material as to be generally self supporting.

9. In a lapping device, a main supporting part provided With an opening in the form ot' a slot 'formed in it, and having a laterally extending limit in the form of a flange, and an auxiliary lapping part adapted for removable mounting upon said main part, said auxiliary part shaped in a generally helical form to provide a helical groove throughout its length, and provided With an inbent portion adapted to engage the opening in said main member and formed of such material as to be generally self supporting.

l0. In a lapping device, a main supporting opening in said main member and formed of such material as to be generally self supporting.

11. In a lapping device, a main supporting part provided with a generally axial opening in the form of a slot formed in it,`

and having a laterally extending limit in the form of a flange, and an auxiliaryV lapping part adapted for removable mounting upon said main part, said auxiliary part being of a material softer than the main part, shaped of a single piece in a generally helical form to provide a helical groove throughout its length, and provided with an inbent portion adapted to engage the opening in said main member and formed of such material as to be generally self supporting.

12. In combination in an abrasive device, a tool holder provided With a plurality of outwardly extending langes,an opening and a metallic tool formed of a single member shaped in a generally helical arrangement and provided at one end with a reduced inbent port-ion adapted to be received Within the opening in the tool holder, one of said Vflanges adapted to serve as a stop for said tool.

13. In combination in an abrasive device, a tool holder provided With a plurality of outwardly extending flanges, an opening and a metallic tool formed of a single member shaped in a generally helical arrangement and provided at one end With a reduced inbent portion adapted to be received Within the opening in the tool holder and provided at its other end With a reduced inwardly bent portion adapted to contact the tool holder one of said lianges adapted to serve as a stop for said tool. v

14. In combination in an abrasive device, a tool holder provided with a plurality of outwardly extending ianges, an opening in the form of a slit extending longitudinally throughout a portion of the tool holder, and a metallic tool formed of 'a single member shaped in a generally helical arrangement and provided at one end with a reduced inbent portion adapted to be received vwithin the openingin the tool holder one of said. fiazges adapted to serve as a stop for said 15. In combination in an abrasive device, a'tool holder provided with a pluralityof outwardly extending flanges, an opening in the form of a slit extending longitudinally throughout a portion of the toolholder, and

a metallic tool formed of a material softer than the holder, formed of a single member shaped in a generally helical arrangement and'provided at one end with a reduced inbent portion adapted to be received within the opening in the tool holder and provided at its other end with a reduced inwardly bent n portion adapted to contactV the tool holder one of said flanges adapted to serve as a stop for said tool.

Signed at Chicago, county of Cook and State of Illinois, this 6th day of April, 1929.

EDGAR ANSTETT. 

